<html>
<head>
<link type="text/css" rel="stylesheet" href="style.css"  />
<script type="text/javascript" src="../src/jquery.js"></script>
<script type="text/javascript" src="script.js"></script>
</head>
<body>
	<div class="box">
		<div class="sh"></div><!-- sh : show and hidden -->
	</div>
	
	<button>show & hidden</button>
</body>
</html>